Tektronix VX4801 User Manual
Tektronix VX4801 User Manual

Tektronix VX4801 User Manual

Programmable digital i/o module

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Summary of Contents for Tektronix VX4801

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 User Manual VX4801 Programmable Digital I/O Module 070-9153-03 This document applies for firmware version 1.00 and above.
  • Page 3 Copyright Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved. Printed in the U.S.A. Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000...
  • Page 4 Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
  • Page 5: Ec Declaration Of Conformity

    EC Declaration of Conformity Tektronix Holland N.V. Marktweg 73A 8444 AB Heerenveen The Netherlands declare under sole responsibility that the VX4801 meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official...
  • Page 9: General Safety Summary

    Product Damage Precautions Provide Proper Ventilation To prevent product overheating, provide proper ventilation. Do Not Operate With If you suspect there is damage to this product, have it inspected by qualified Suspected Failures service personnel. VX4801 Programmable Digital I/O Module...
  • Page 10: Safety Terms And Symbols

    Overvoltage Category Overvoltage categories are defined as follows: CAT III: Distribution level mains, fixed installation CAT II: Local level mains, appliances, portable equipment CAT I: Signal level, special equipment or parts of equipment, telecommunica- tion, electronics VX4801 Programmable Digital I/O Module...
  • Page 21 units Output high voltage (V = –20 A = –6 mA 3.84 Output low voltage (V = 20 A = 24 mA Output low current (l Input high voltage (V Input low voltage (V * Input current (l Tri-state leakage current (l * There are 22 k pull-up resistors to + 5V on all I/O and handshake lines to account for floating inputs.
  • Page 78: Appendix E: Performance Verification

    GPIB controller and software (NI-488.2M) configured as described in Table 3. In the test sequences, you will be instructed to issue Interface Bus Interactive Control (ibic) commands to set up the VX4801 under-test and other associated VXIbus test instruments. Please refer to the NI-488.2M User Manual for additional information.
  • Page 79: Equipment Required

    The verification sequences in this procedure are valid when the following requirements are met: The VX4801 module covers are in place and the module is installed in an approved VXIbus mainframe as described in Section 2 of the Operating Manual...
  • Page 80 Byte 2 MSB 34 18 1 Allow approximately 6” Byte 1 Tri-St length of interconnect Byte 2 Tri-St wire between modules. VX4801 Under-test VX4801 Slave Module Figure 4: Loop-Back Cable Assembly (View of Solder Side) A–21 VX4801 Programmable Digital I/O Module...
  • Page 81 Appendix E: Performance Verification VX4801 Under-Test Configuration In order to perform this procedure, the VX4801 under-test must be installed in an approved VXIbus system. At a minimum, the system must contain the elements listed in Table 2. Table 2: Elements of a Minimum VX4801 Under-Test System...
  • Page 82: Test Record

    Appendix E: Performance Verification Test Record Photocopy the Test Record, and use it to record the performance verification results for your module. Table 4: VX4801 Test Record VX4801 Serial Number: Temperature and Relative Humidity: Date of Last Calibration: Verification Performed by:...
  • Page 83: Performance Verification Tests

    Following the VXIbus system startup sequence, the green PWR light on the VX4801 front panel indicates that the self test has passed and that the +5 V power supply is operational. If the +5 V power supply fails, or its fuse opens, the PWR light will be off, the FAILED light will be on, and SYSFAIL* will be asserted indicating a module failure.
  • Page 84 Response to Verify 2. Verify the VX4801 VXIbus interrupt capability with the following steps: NOTE. Make sure your Slot 0 controller and the VX4801 under-test are set to the same interrupt level (see User Manual for location of interrupt setting). Also, if you are using National Instruments NI-488.2 software, make sure Auto Serial...
  • Page 85 (Observe: VX4801 ERR light is off) (Observe: SYNTAX ERROR.. ) TTL/CMOS I/O This test sequence verifies that each eight bit port (6) of the VX4801 can provide both active high and low TTL/CMOS inputs and outputs. Equipment Loop-back assembly (item 3)
  • Page 86 3. Verify the odd byte data inputs and the even byte data outputs with the following steps: a. Reset the VX4801 to its power-up state and then set its mode for the odd bytes (1, 3, 5) to be active low inputs, for the even bytes (0, 2, 4) to be active high outputs loaded with a Load Output value of 55, and set the tri-state function to be inactive (* =>...
  • Page 87 4. To verify the even byte data inputs and the odd byte data outputs, reset the VX4801 to its power-up state and then set its mode for the even bytes (0, 2, 4) to be active low inputs, for the odd bytes (1, 3, 5) to be active high outputs loaded with a Load Output value of 55, and set the tri-state function to be inactive.
  • Page 88 (Observe: response of FF00FF00FF00) 3. Verify the external tri-state signals with the following steps: a. Set up the Slave VX4801 to disable the external tri-state signals (ETS0 - ETS5) to the VX4801 device-under-test: b. Set up the VX4801-device-under-test for odd bytes to be inputs, for even bytes to be outputs with a Load Output value of 00, and for internal tri-state to be inactive for all bytes.
  • Page 89 Appendix E: Performance Verification (Observe: response of 00FF00FF00FF) d. Set the Slave to un-assert external tri-state signals. Then set the VX4801 for the odd bytes to be inputs, for the even bytes to be outputs with a Load Output value of 00, and for internal tri-state to be inactive for all bytes.
  • Page 90 1. Connect the loop-back assembly as shown in figure 4. 2. Using the following steps, verify a data byte transfer 55 hexadecimal from the VX4801 (byte 5) to the Slave (byte 3) using the Ready for Data (RFD) from the Slave and the Data Valid (DAV) from the VX4801: a.
  • Page 91 (Observe: 0155 return value) 3. Using the following steps, verify a data byte transfer (AA hex) from the Slave (byte 5) to the VX4801 (byte 3) using the Data Ready (DRD) and Data Acknowledge (DAK) handshake lines: a. Set the Slave mode for byte 2 and 3 to be active high outputs, with...
  • Page 92 Appendix E: Performance Verification e. Send a byte 5 input command to the VX4801 and verify that the DAK light is on. Then read the data, observe a response of AA, perform a second read and observe that the VX4801 is again waiting for a DRD...

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070-9153-03

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